| article html file updated | 6 February 2020 09:39 CET | Update | https://www.mdpi.com/2075-1680/3/2/260 |
| article html file updated | 20 September 2019 08:49 CEST | Update | - |
| article html file updated | 21 March 2019 18:02 CET | Update | - |
| article html file updated | 15 February 2017 11:01 CET | Original file | - |
| article pdf uploaded. | 30 May 2014 14:36 CEST | Version of Record | https://www.mdpi.com/2075-1680/3/2/260/pdf |
